My OBC is currently set in German. How to i set it back to English?Thanks in advance...

OK, I went out and deciphered it for you. :) Here it is:

Press the “10” and “1000” buttons simultaneously. You will see the following display:

Funktion: --

Press the “1” button to change the function. Functions are as follows:

00 – test mode. This lights up every part of the display
01 – language. You can change the languages here. There are choices for both English AND American.
02 – time display. Changes between 12 and 24 hour time.
03 – date display. Changes between month/day or day/month
04 – temperature display. Changes between Fahrenheit and Celsius
05 – Quarz. Not sure of this function.
06 – Status. Not sure of this function.
07 – no function
08 – no function
09 – no function